I just edited your post to make sure the link works. This sounds fun though, I'll give it a shot.

That can be harmful. Here's why: By "any two numbers," do you mean strictly related to math? Or could it any concept that can be summed up in a number? For example, you could 'multiply' the numerical value of somebody's age. They'd go from 16 to 32 just like that, or even farther. That's a pretty dangerous power, I'd say.

As for my power… the ability to move things, no matter the size, at any velocity you want (however, you can't make it go faster than or equal to the speed of light). The object also has to be in your line of sight.